Effects of Multiple Modifiers on Adhesive and Self-Healing Properties of Asphalt Based on Bitumen Bond Strength Test
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1.Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China;2.China Construction Eighth Engineering Division Co., Ltd., Shanghai 200135,China

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U414

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    Abstract:

    Adhesive and self-healing properties are two inherent properties that should be considered when evaluating the durability of asphalt materials. In this paper, the binder bond strength (BBS) test is applied to evaluate the effects of five representative modifiers at varying dosages on the adhesive and self-healing properties of asphalt. Moreover, the four-point beam (4PB) fatigue test with a healing interval period is conducted and correlated with BBS testing results. It is found that linear SBS, high-density polyethylene (HDPE) and rubber all have negative effects on the asphalt adhesive strength while only gilsonite can enhance the adhesive property. HDPE, rubber and gilsonite at lower dosages (≤12.0%) can improve the asphalt self-healing property. In addition, the strong correlation of the healing performance between binder and mixture is found, verifying the accuracy of the BBS test in evaluating the healing performance of asphalt materials.

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HUANG Weidong, ZHOU Lu, LV Quan, GUAN Weiyang. Effects of Multiple Modifiers on Adhesive and Self-Healing Properties of Asphalt Based on Bitumen Bond Strength Test[J].同济大学学报(自然科学版),2021,49(5):670~679

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History
  • Received:October 04,2020
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  • Online: May 24,2021
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